ASTM F963中关于呦呦球的测试，他提出“Elastic”长度要求，这个“Elastic”具体指那类绳子？有那位高人可以给予指点迷津，本人万分感谢 4.38 Yo Yo Elastic Tether Toys—These requirements are intended to address potential strangulation hazards associated with yo yo elastic tether toys intended for children 3 years of age or older. Paddle balls are excluded from this requirement. 4.38.1 Toys with an end mass greater than 0.02 kg (0.04 lb) shall have cord length less than 50 cm (20 in.) measured when rotating at 80 r/min. Testing shall be conducted in accordance with 8.24.
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